I ran the script directly on your page after load and it worked correctly. However, on page load I did notice that my console threw an error. I would probably go through your javascripts and disable them one by one to figure out what is causing that error. I'm actually skeptical that it's your javascripts because I only get this error on the pages where your slideshow is.

Try once more before disabling anything :

Add this to javascript management, placement should be in the homepage :